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Help CenterOEM Injection Mold for Food Caps: 24-cavity Hot Runner, S136 Steel, 300K Cycles, Airtight Sealing, PP Material.
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Changzhou Hongxinyutai Precision Mold Co., Ltd., established in 2017 with a factory spanning 1,000-3,000 square meters and a skilled team of 51-100 employees, is proud to present our OEM injection mold for food caps. This precision tool is engineered to deliver high-efficiency production of plastic caps with airtight sealing, using a 24-cavity hot runner system and premium S136 steel. Designed for reliability and longevity, this mold supports 300,000 cycles and is optimized for PP material, making it an ideal solution for food packaging manufacturers seeking consistent quality and reduced downtime.
Our mold is built to meet the demanding requirements of the food industry, where hygiene, sealing integrity, and production speed are critical. With the hot runner technology, material waste is minimized, cycle times are shortened, and part quality is enhanced. Combine this with the corrosion-resistant S136 steel, and you get a mold that not only performs but also lasts longer, lowering your total cost of ownership. Below, we break down the key features and specifications that set this mold apart.
Key Features & Technical Specifications
- 24-Cavity Hot Runner System – Enables high-output production with precise temperature control, reducing scrap rate and ensuring uniform filling across all cavities. Each cavity is independently balanced for consistent cap dimensions.
- S136 Stainless Steel Construction – Offers excellent corrosion resistance, high hardness (HRC 48-52), and good polishability, ensuring a smooth cavity surface that prevents sticking and facilitates easy release of PP caps.
- Airtight Sealing Design – The mold is engineered with specially designed sealing lips and overlap geometries to produce caps that provide hermetic closure for food containers, protecting contents from moisture and contaminants.
- 300,000 Cycle Durability – Tested to deliver reliable performance over 300,000 injection cycles without significant wear, backed by proper heat treatment and fit tolerances.
- Optimized for PP Material – Gate location, cooling channels, and venting are tailored for polypropylene, ensuring fast crystallization, minimal shrinkage, and high gloss finish.
- OEM Customization Available – Mold dimensions, cap design, and specific features (e.g., tamper-evident band, thread type) can be customized per client drawings or samples.
Technical Specification Table
| Parameter | Value |
|---|---|
| Number of Cavities | 24 |
| Runner Type | Hot runner (with individual nozzle control) |
| Mold Steel | S136 (AISI 420 equivalent) |
| Hardness (HRC) | 48-52 |
| Material Compatibility | PP (polypropylene) |
| Cycle Life Guaranteed | 300,000 cycles |
| Sealing Performance | Airtight (leak-tested per industry standards) |
| Cooling Method | Conformal cooling channels (optional) |
| Certification | TS16969 |
The above specifications are derived from our standard mold design, but we can adjust parameters such as cavity layout, gate type, and cooling configuration to match your specific injection molding machine (e.g., clamping force, shot size) and production volume. Our engineering team uses advanced CAD/CAM/CAE software to simulate filling, cooling, and warpage, ensuring first-shot success.
Client Benefits
- Higher Productivity – 24 cavities per cycle significantly boost output compared to lower-cavity molds, reducing per-part cycle cost.
- Reduced Material Waste – Hot runner eliminates cold runner scrap, saving up to 30% resin compared to cold runner systems.
- Consistent Quality – Precision machining and balanced flow produce caps with identical weight, dimensions, and sealing performance across all cavities.
- Longer Mold Life – S136 steel and proper heat treatment ensure the mold withstands 300K+ cycles with minimal maintenance, lowering long-term investment.
- Improved Food Safety – Airtight sealing design meets hygiene standards for food packaging, preventing leakage and contamination.
- Faster Time-to-Market – As an experienced OEM manufacturer, we typically deliver molds in 25-35 working days depending on complexity, with full trial support.
Trust & Capability
With a factory area of 1,000-3,000 square meters, we have dedicated facilities for design, CNC machining, EDM, wire cutting, assembly, and testing. Our 51-100 employees include 15+ experienced mold engineers and technicians. We have shipped molds to clients across North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and domestic China. The mold is manufactured under our TS16969 quality management system, ensuring traceability and process control. To date, we have successfully delivered over 500 injection molds for caps and closures, with a customer satisfaction rate of 98%. We offer a 12-month warranty on workmanship and materials, and provide lifetime technical support.
Choosing Changzhou Hongxinyutai means partnering with a reliable manufacturer that prioritizes precision, durability, and customer service. From initial design consultation to final mold commissioning, we work closely with you to ensure the mold meets your exact requirements. Contact us today for a quotation or to discuss your food cap molding project – we are ready to deliver a mold that drives your production efficiency.
Frequently Asked Questions
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Q: What is the typical delivery time for this 24-cavity hot runner mold?
A: Our standard lead time is 25-35 working days after design approval and deposit. For rush orders, expedited delivery (18-22 days) is available upon request, subject to current workload. -
Q: Can the mold be adapted for materials other than PP?
A: Yes, while the mold is optimized for PP, we can adjust gate design, cooling, and surface finish to run PE, PS, or other thermoplastics. Please consult our engineers for material-specific modifications. -
Q: What kind of maintenance does this mold require after 300,000 cycles?
A: Regular maintenance includes cleaning of hot runner nozzles, checking for wear on core/cavity inserts, and verifying cooling channel flow. We provide a detailed maintenance manual and spare parts list. After 300K cycles, components like nozzles or ejector pins may need replacement, which we can supply. -
Q: Do you provide mold trial and samples before shipment?
A: Absolutely. We offer free mold trial in our factory using your specified material (PP) and send you 50-100 samples for quality approval. Full test reports including dimensional, sealing, and visual inspection are provided. -
Q: Is the hot runner system standard or customizable?
A: We use standard hot runner components from reputable brands (e.g., Yudo, Mold-Masters) as default, but we can integrate customer-preferred systems or customize nozzle lengths, gate types (valve gate, open gate), and temperature control zones to suit your part design. -
Q: How is the airtight sealing performance verified?
A: Sealing is tested using a pressure decay method or water immersion test per client specifications. We can also perform leak testing on final caps using industry-standard equipment. Typical leak rate target is <0.5 cc/min at 0.5 bar. -
Q: What is your warranty policy?
A: We offer a 12-month warranty from the date of shipment covering defects in materials and workmanship. During warranty, we repair or replace faulty parts free of charge (excluding wear items). We also provide remote troubleshooting and on-site service if needed (travel expenses apply). -
Q: Can you provide references from food industry clients?
A: Yes, we have successfully supplied molds to food packaging companies in Europe, North America, and Asia. Upon request, we can share anonymized case studies and contact information of clients who have agreed to be references.
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